WO2018139649A1

WO2018139649A1 - Heat exchanger

Info

Publication number: WO2018139649A1
Application number: PCT/JP2018/002763
Authority: WO
Inventors: 猛宗石
Original assignee: 京セラ株式会社
Priority date: 2017-01-30
Filing date: 2018-01-29
Publication date: 2018-08-02
Also published as: JPWO2018139649A1; JP7208326B2; JP2022008923A; EP3575722B1; US20190390912A1; EP3575722A4; EP3575722A1; US11486648B2

Abstract

Disclosed is a heat exchanger that is provided with a plurality of first members (1), and a plurality of second members (2) that are positioned between first members adjacent to each other. Each of the first members has a plurality of openings (5), and a first flow channel (6) connected to the openings. Each of the second members has a second flow channel (7) connected to respective openings in the first members adjacent to each other. The openings and the first flow channel in each of the first members, and the second flow channel in each of the second members are flow channels for a first fluid. A region between the first members adjacent to each other is a flow channel for a second fluid. The heat exchanger is also provided with a third member (3) that extends toward the region, said third member being on each of the first members.

Description

Heat exchanger

This disclosure relates to a heat exchanger.

Conventionally, heat exchangers are used for heat exchange systems such as cooling or heating. As an example of such a heat exchanger, Patent Document 1 includes a plurality of long plates arranged in parallel and slits between the long plates, and is continuous in the longitudinal direction with some surfaces of the long plates. A plurality of substrates provided with recesses are stacked, the long plates of the adjacent substrates are connected to each other to form a tube, the recesses form an in-tube flow path, and the slits form an external flow path. A configured heat exchanger has been proposed.

Japanese Patent Laying-Open No. 2005-300062

The heat exchanger according to the present disclosure includes a plurality of first members and a plurality of second members positioned between the adjacent first members. The first member has a plurality of openings and a first flow path connected to the openings. The second member has a second flow path connected to each opening in the adjacent first member. Further, the opening in the first member, the first flow path, and the second flow path in the second member are flow paths for the first fluid. A region between the adjacent first members is a flow path for the second fluid. Further, a third member extending toward the region is further provided on the first member.

It is an appearance perspective view showing an example of a heat exchanger of this indication. FIG. 2 is a cross-sectional view taken along line ii-ii in FIG. It is an external appearance perspective view which shows the other example of the heat exchanger of this indication. FIG. 4 is a sectional view taken along line iv-iv in FIG. 3. It is an external appearance perspective view which shows the other example of the heat exchanger of this indication. FIG. 6 is a cross-sectional view taken along line vi-vi in FIG. 5. It is an external appearance perspective view which shows the other example of the heat exchanger of this indication. FIG. 8 is a cross-sectional view taken along line vii-vii in FIG. It is an external appearance perspective view which shows the other example of the heat exchanger of this indication. FIG. 10 is a cross-sectional view taken along line xx in FIG. 9. It is an external appearance perspective view which shows the other example of the heat exchanger of this indication. FIG. 12 is a cross-sectional view taken along line xii-xii in FIG. FIG. 12 is a cross-sectional view taken along line xiii-xiii in FIG.

今 Today's heat exchangers are required to improve heat exchange efficiency, including miniaturization. The heat exchanger of the present disclosure has excellent heat exchange efficiency. Below, the heat exchanger of this indication is explained in detail, referring to drawings. In each figure, numerals and alphabets are used for identifying the heat exchanger, but only the numerals are described except for the description of the configuration specific to each figure.

The heat exchanger 10 of the present disclosure includes a plurality of first members 1. Here, in FIG. 1 and FIG. 2, the heat exchanger 10a provided with the three 1st members 1 is shown as an example. If the number of the first members 1 is three or more, the heat exchanger 10 of the present disclosure is particularly suitable for downsizing. In addition, the number of the 1st members 1 is not limited to this, What is necessary is just two or more.

FIG. 1 shows an example in which the shape of the first member 1 is a square plate shape, but the shape is not limited to this, and it may be a disk shape or an elliptical plate.

In addition, the first member 1 in the heat exchanger 10 of the present disclosure has a plurality of openings 5 and a first flow path 6 connected to the openings 5. 1 and 2, among the three first members 1, the upper first member 1a and the middle first member 1b have four openings 5, and the lower first member 1c has two pieces. Show an example having an opening 5. In addition, the number of the opening parts 5 should just be two or more, and is not limited to the structure shown in FIG.1 and FIG.2 including the structure of the 1st member 1 from which the number of the opening parts 5 differs.

Furthermore, the heat exchanger 10 of the present disclosure includes a plurality of second members 2 positioned between the adjacent first members 1. The second member 2 has a second flow path 7 connected to each opening 5 in the adjacent first member 1. The shape of the second member 2 may be any shape as long as it has the second flow path 7.

In the heat exchanger 10 of the present disclosure, the opening 5 in the first member 1, the first flow path 6, and the second flow path 7 in the second member 2 are flow paths for the first fluid. Here, the flow path of the first fluid in the heat exchanger 10a shown in FIGS. 1 and 2 will be described. First, the first fluid is introduced from the opening 5IN in the upper first member 1a. And after passing the 1st flow path 6 of each 1st member 1, and the 2nd flow path 7 of each 2nd member 2, it discharges | emits from the opening part 5OUT in the 1st member 1a of an upper stage.

And in the heat exchanger 10 of this indication, the field between the 1st members 1 which adjoin is a channel of the 2nd fluid. When the second fluid passes between the adjacent first members 1, heat exchange is performed between the first member 1 and the second member 2 through which the first fluid flows. Depending on the temperature relationship between the first fluid and the second fluid, the second fluid can be cooled or heated. In addition, a liquid or gas etc. can be used for the 1st fluid and the 2nd fluid according to the objective. For example, the first fluid can be a liquid such as water and the second fluid can be a gas such as a gas.

The heat exchanger 10 of the present disclosure further includes a third member 3 that extends toward the region between the adjacent first members 1 on the first member 1. The presence of the third member 3 causes a change in the flow of the second fluid when the second fluid passes between the adjacent first members 1, so that the second fluid is the first member 1 and the second fluid. The opportunity to contact the member 2 increases. Furthermore, since the 3rd member 3 is connected with the 1st member 1, it is cooled or heated by the 1st fluid which flows through the 1st flow path 6 of the 1st member 1, Therefore The 3rd member 3 and the 2nd fluid And heat exchange is performed. Therefore, the heat exchanger 10 of the present disclosure that satisfies such a configuration has excellent heat exchange efficiency.

Here, the third member 3 may have any shape, but the contact area between the third member 3 and the second fluid can be increased without excessively obstructing the flow of the second fluid. The point may extend along the direction in which the second fluid flows.

In the following description, the second fluid is described as flowing from the front to the back on the illustrated surface. The short direction of the first member 1 will be described as the width direction. Based on this, in FIG. 1, the third member 3 has a square plate shape extending along the width direction of the first member 1.

Further, as shown in the heat exchanger 10a in FIGS. 1 and 2, a plurality of the third members 3 may be located at intervals. If such a configuration is satisfied, there are a plurality of third members 3 that exchange heat with the second fluid, so that the heat exchange efficiency is improved.

Moreover, the 3rd member 3 may be connected with each of the 1st member 1 which opposes like the heat exchanger 10b shown in FIG. 3 and FIG. If such a configuration is satisfied, the third member 3 is cooled or heated by the first fluid flowing through the first flow paths 6 of the two first members 1 to which the third member 3 is connected. The heat exchange between the third member 3 and the second fluid is performed more efficiently.

Also, like the heat exchanger 10c shown in FIGS. 5 and 6, the flow width of the second fluid in the adjacent third member 3 may be different between the inlet and the outlet. Here, according to the heat exchanger 10c shown to FIG. 5 and FIG. 6, the adjacent 3rd member 3 is the 3rd member 3a and the 3rd member 3b, the 3rd member 3b, the 3rd member 3c, and the 3rd member. 3c and the third member 3d.

And the flow path width of the second fluid is different between the inlet and the outlet, taking the third member 3a and the third member 3b as an example, as shown in FIG. That is, the length of the outlet channel width C1 is different. The inlet channel width B1 is the shortest distance between the end of the third member 3a and the end of the third member 3b on the inflow side of the second fluid. The outlet channel width C1 is the shortest distance between the end of the third member 3a and the end of the third member 3b on the second fluid outflow side.

If such a configuration is satisfied, when the second fluid flows between the adjacent third members 3, the flow rate of the second fluid increases and turbulence is generated, thereby improving the heat exchange efficiency. . The narrower channel width in the inlet channel width B1 and the outlet channel width C1 is, for example, 0.5 mm or more.

Moreover, when the flow path of the 2nd fluid in the adjacent 3rd member 3 is made into the flow path A like the heat exchanger 10c shown to FIG. 5 and FIG. May have different channel width relationships between the inlet and outlet of the second fluid in each channel A.

Here, in the heat exchanger 10c, the adjacent flow paths A have different flow path width relationships between the inlet and the outlet of the second fluid in each flow path A, and will be described with reference to FIG. To do. First, the flow path of the second fluid in the third member 3a and the third member 3b is A1, the flow path of the second fluid in the third member 3b and the third member 3c is A2, the third member 3c and the third member 3d The flow path of the second fluid is A3. In the channel A1, B1> C1 in the magnitude relationship between the length of the inlet channel width B1 and the outlet channel width C1. In the flow channel A2, B2 <C2 in the relationship of the length between the flow channel width B2 at the inlet and the flow channel width C2 at the outlet. In the flow path A3, B3> C3 in the size relationship between the flow path width B3 at the inlet and the flow path width C3 at the outlet. Thus, in the adjacent flow paths A (the flow paths A1 and A2, the flow paths A2 and the flow paths A3), the length of the flow path width of the inlet and the flow width of the outlet of each flow path A The magnitude relationship is different. If such a configuration is satisfied, a turbulent flow is generated when the second fluid flows through each flow path A, and the heat exchange efficiency is improved.

Moreover, you may further provide the 4th member 4 extended toward the area | region between the adjacent 1st members 1 from the 3rd member 3 like the heat exchanger 10d shown in FIG.7 and FIG.8. If such a configuration is satisfied, the first member 1 is cooled or heated not only by the first member 1, the second member 2 and the third member 3 but also by the first fluid flowing through the first flow path 6 of the first member 1. The heat exchange efficiency is improved by the heat exchange between the fourth member 4 and the second fluid via the three members 3.

Here, the fourth member 4 may have any shape, but the contact area between the fourth member 4 and the second fluid can be increased without excessively impeding the flow of the second fluid. In the point, like the third member 3, the shape may extend along the direction in which the second fluid flows. FIG. 7 shows an example in which the fourth member 4 has a square plate shape extending along the width direction of the first member 1.

Further, a plurality of the fourth members 4 may be positioned at intervals like the heat exchanger 10d shown in FIGS. If such a configuration is satisfied, since there are a plurality of fourth members 4 that exchange heat with the second fluid, the heat exchange efficiency is improved.

Moreover, the 4th member 4 may be connected with each of the 3rd member 3 which opposes like the heat exchanger 10e shown to FIG. 9 and FIG. If such a configuration is satisfied, it is cooled or heated by the first fluid flowing through the first flow path 6 of the first member 1 via the two third members 3 to which the fourth member 4 is connected. Therefore, the heat exchange between the fourth member 4 and the second fluid is performed more efficiently.

Moreover, the 4th member 4 may be contacting the 2nd member 2 like the heat exchanger 10f shown in FIG. If such a configuration is satisfied, the fourth member 4 is cooled or heated by the first fluid flowing through the second flow path 7 of the second member 2 that is in contact with the fourth member 4. Heat exchange with the two fluids is performed more efficiently.

Further, when the shape of the third member 3 and the fourth member 4 is a plate-like, shown in FIG. 10, the average value of H ₃ of the shortest distance h ₃ between the third member 3 adjacent, adjacent fourth member 4 When the average value of the shortest distance h ₄ between them is H ₄ , the ratio H ₃ / H ₄ may be 1 or more and 20 or less.

Furthermore, when the average value of the thicknesses t ₃ of the third members 3 shown in FIG. 10 is T ₃ , the ratio H ₃ / T ₃ may be 2 or more and 25 or less. And when the average value of the thickness t ₄ of each fourth member 4 shown in FIG. 10 is T ₄ , the ratio H ₄ / T ₄ may be 0.5 or more and 2 or less.

H ₃ is, for example, 0.5 mm to 70 mm. H ₄ is, for example, 2 mm to 15 mm. T ₃ is, for example, 0.5 mm to 1.5 mm. T ₄ is, for example, 0.5 mm to 1.5 mm.

Moreover, the 1st member 1, the 2nd member 2, the 3rd member 3, and the 4th member 4 which comprise the heat exchanger 10 of this indication may be comprised from ceramics. Thus, if each member (the 1st member 1, the 2nd member 2, the 3rd member 3, the 4th member 4) consists of ceramics, the heat exchanger 10 of this indication will have heat resistance and corrosion resistance. Excellent. Here, the kind of the ceramic may be appropriately selected according to the characteristics of the first fluid and the second fluid, and oxide ceramics such as alumina ceramics or cordierite ceramics, silicon nitride ceramics, and aluminum nitride ceramics. Alternatively, non-oxide ceramics such as silicon carbide ceramics can be used. Among these, if each member consists of silicon carbide ceramics, the heat exchanger 10 of this indication will be excellent in mechanical strength, and will be suitable for size reduction.

Here, for example, silicon carbide-based ceramics contains 70% by mass or more of silicon carbide out of 100% by mass of all components constituting the ceramics. And the material of each member which comprises the heat exchanger 10 of this indication can be confirmed with the following method. First, measurement is performed using an X-ray diffractometer (XRD), each member is measured, and identification is performed using a JCPDS card from the obtained 2θ (2θ is a diffraction angle) value. Next, quantitative analysis of the components contained in each member is performed using an ICP (Inductively-Coupled-Plasma) emission spectroscopic analyzer (ICP) or a fluorescent X-ray analyzer (XRF). Then, for example, if the presence of silicon carbide is confirmed by the above identification and the content converted from silicon (Si) content measured by ICP or XRF to silicon carbide (SiC) is 70% by mass or more, carbonization Silicon ceramics.

In addition, at least one of the first member 1, the second member 2, the third member 3, and the fourth member 4 constituting the heat exchanger 10 of the present disclosure is a surface that is in contact with a region between the adjacent first members 1. May have a plurality of protrusions. Here, the protrusion refers to a portion protruding from a line connecting portions not having a protrusion on the surface of each member. And if such a structure is satisfied, the heat exchange efficiency will improve because the surface area of each member which comprises the heat exchanger 10 of this indication increases by several protrusion.

The protrusion may be made of any material, but if it is made of the same material as each member, the risk of the protrusion dropping off due to the difference in thermal expansion between each member and the protrusion is reduced. .

Further, the protrusion may have an average diameter of 10 μm or more and 60 μm or less in a front view. In addition, the front view here is, in other words, a plan view of a surface having a protrusion in each member. If such a configuration is satisfied, the projection is unlikely to be removed from each member, and the surface area of the projection can be increased. Therefore, the heat exchange efficiency of the heat exchanger 10 of the present disclosure is improved.

Here, the average diameter of the protrusions in front view can be calculated by the following method. First, the photograph which looked at the surface which has a processus | protrusion in each member is taken using a scanning electron microscope (SEM). Next, in this photograph, the outline of the protrusion is outlined in black. Thereafter, image analysis is performed by applying a technique called particle analysis of image analysis software “A Image-kun” (registered trademark, manufactured by Asahi Kasei Engineering Co., Ltd.) using the trimmed photograph. Then, an average value of the equivalent circle diameters of the protrusions calculated by the image analysis may be set as the average diameter of the protrusions in the front view. As analysis conditions for “A image-kun”, for example, the brightness of crystal grains may be “bright”, the binarization method may be “automatic”, and the shading may be “present”.

In addition, the heat exchanger 10 of the present disclosure is not particularly limited in use as long as it performs heat exchange. For example, for various laser devices, for vehicles, for chemical substance recovery devices, for semiconductor elements It can also be used as a heat exchanger for semiconductor manufacturing equipment.

Hereinafter, a method for producing the heat exchanger 10 of the present disclosure will be described.

First, a method for producing the first member 1 will be described. In addition, in the following description, the case where the 1st member 1 is comprised with ceramics is mentioned as an example, and is demonstrated.

First, a sintering aid, a binder, a solvent, a dispersing agent, and the like are added to a raw material (silicon carbide, aluminum oxide, etc.) powder as a main component and mixed as appropriate to prepare a slurry. Next, using this slurry, a ceramic green sheet is produced by a doctor blade method. Next, a plurality of ceramic green sheets having an arbitrary shape are stacked by punching with a mold or laser processing to produce a formed body that is a stacked body. And the 1st member 1 which has the opening part 5 and the 1st flow path 6 is obtained by baking this molded object. Here, it is easy to produce the first flow path 6 inside the first member 1 by producing a molded body as a laminate. Moreover, the thickness of the 1st member 1 can be adjusted by adjusting the number of the ceramic green sheets to laminate | stack. The opening 5 may be formed by punching a ceramic green sheet with a mold or laser processing.

Further, when the molded body of the first member 1 is produced, a portion that becomes a protrusion may be formed in advance. For example, a portion that becomes a protrusion may be formed by pressing a mold having a recess against the surface or by cutting the surface by laser processing or blasting. Or you may sprinkle the powder used as protrusion on the surface using a sieve etc.

As another method for producing ceramic green sheets, granules are produced by spray drying and granulating the slurry by a spray granulation method (spray drying method), and the granules are produced by a roll compaction method or a mechanical press method. May be.

Next, a method for producing the second member 2 will be described. The 2nd member 2 should just select the molding method according to the shape. For example, if the shape of the second member 2 is a pipe, the slurry may be adjusted to a clay and manufactured by an extrusion method. Or what is necessary is just to produce by the mechanical press method and the cold isostatic pressing (CIP) method using the said granule. Moreover, if the shape of the 2nd member 2 is made into plate shape, like the 1st member 1, what is necessary is just to laminate | stack a ceramic green sheet and produce the molded object which is a laminated body. And the 2nd member 2 is obtained by baking a molded object.

In addition, also in the molded body of the 2nd member 2, you may previously form the part used as protrusion by the method mentioned above.

Next, a method for producing the third member 3 and the fourth member 4 will be described. As with the first member 1, the third member 3 and the fourth member 4 are obtained by producing a ceramic green sheet molded body by a doctor blade method, a roll compaction method, or a mechanical press method and firing it.

In addition, also in the molded body of the third member 3 and the fourth member 4, a portion to be a protrusion may be formed in advance by the method described above.

And the 1st member 1, the 2nd member 2, the 3rd member 3, and the 4th member 4 are joined using an adhesive agent, respectively, and the heat exchanger 10 of this indication is obtained. Here, if the configuration has both the third member 4 and the fourth member 4 as in the heat exchanger 10d in FIG. 7, the heat exchanger 10e in FIG. 9, and the heat exchanger 10f in FIG. Thus, the third member 3 and the fourth member 4 may be integrated, and this may be joined to the first member 1 using an adhesive.

In addition, as said adhesive agent, what kind of adhesive agent can be used as long as each member can be joined, However, If an inorganic adhesive agent is used, it will not degrade each member, when heat processing is performed. Each member can be joined firmly. Furthermore, since the inorganic adhesive is excellent in heat resistance and corrosion resistance, the reliability of the heat exchanger 10 of the present disclosure can be improved. Here, as the inorganic adhesive, for example, SiO ₂ —Al ₂ O ₃ —B ₂ O ₃ —RO glass paste (R: alkaline earth metal element) or Si—SiC paste may be used. In particular, if the first member 1, the second member 2, the third member 3, and the fourth member 4 are made of silicon carbide ceramics, the thermal expansion coefficient of the silicon carbide ceramics is approximate as an inorganic adhesive. If the Si—SiC paste is used, the high temperature strength of the heat exchanger 10 of the present disclosure can be improved.

It should be noted that the present disclosure is not limited to the above-described embodiment, and various changes and improvements can be made without departing from the gist of the present disclosure.

1: 1st member 2: 2nd member 3: 3rd member 4: 4th member 5: Opening part 6: 1st flow path 7: 2nd flow path 10: Heat exchanger

Claims

A plurality of first members;
A plurality of second members located between the adjacent first members,
The first member is
A plurality of openings;
A first flow path connected to the opening,
The second member is
A second flow path connected to each of the openings in the adjacent first members;
The opening in the first member, the first flow path, and the second flow path in the second member are flow paths of the first fluid, and a region between the adjacent first members is the second fluid. A flow path,
The heat exchanger further comprising a third member extending toward the region on the first member.
The heat exchanger according to claim 1, wherein the third member is connected to the opposing first member.
The heat exchanger according to claim 1 or 2, wherein a plurality of the third members are located at intervals.
The heat exchanger according to claim 3, wherein a flow path width of the second fluid in the adjacent third members is different between an inlet and an outlet.
When the flow path of the second fluid in the adjacent third member is a flow path A, a plurality of the flow paths A are provided, and the adjacent flow paths A have the second fluid in each of the flow paths A. The heat exchanger according to claim 4, wherein the relationship between the channel widths of the inlet and the outlet is different.
The heat exchanger according to any one of claims 1 to 5, further comprising a fourth member extending from the third member toward the region.
The heat exchanger according to claim 6, wherein a plurality of the fourth members are located at intervals.
The heat exchanger according to claim 6 or 7, wherein the fourth member is connected to the opposing third member.
The heat exchanger according to any one of claims 6 to 8, wherein the fourth member is in contact with the second member.
The heat exchanger according to any one of claims 6 to 9, wherein the first member, the second member, the third member, and the fourth member are made of silicon carbide ceramics.
11. The heat according to claim 6, wherein at least one of the first member, the second member, the third member, and the fourth member has a plurality of protrusions on a surface in contact with the region. Exchanger.
The heat exchanger according to claim 11, wherein the protrusion has an average diameter of 10 μm or more and 60 μm or less in a front view.